311318129 has 2 divisors, whose sum is σ = 311318130. Its totient is φ = 311318128.

The previous prime is 311318107. The next prime is 311318141. The reversal of 311318129 is 921813113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244078129 + 67240000 = 15623^2 + 8200^2 .

It is a cyclic number.

It is not a de Polignac number, because 311318129 - 2¹⁶ = 311252593 is a prime.

It is not a weakly prime, because it can be changed into another prime (311318149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155659064 + 155659065.

It is an arithmetic number, because the mean of its divisors is an integer number (155659065).

Almost surely, 2^311318129 is an apocalyptic number.

It is an amenable number.

311318129 is a deficient number, since it is larger than the sum of its proper divisors (1).

311318129 is an equidigital number, since it uses as much as digits as its factorization.

311318129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 311318129 is about 17644.2095034037. The cubic root of 311318129 is about 677.7478323348.

The spelling of 311318129 in words is "three hundred eleven million, three hundred eighteen thousand, one hundred twenty-nine".